Take the barrel out of the gun . Let barrel / chamber determine the oal & crimp . You want casehead flush with the end of barrel hood . Hold barrel vertical & do the " plunk " test with your loaded ammo . Write your results down . Once it's been determined this will be Oal / crimp for that weight / brand bullet & that pistol only . Since you have several 9mm's you'll find they're all different . Part of the joy of loading for a 9mm , kind of like bleeding piles .